Organize your (illegal) collection :)

Hi,

I think most of the people will have a nice collection with (illegal) software for use with their msx or emulators. And I was wondering how do you organize your collection ?

I have the following structure:

Software
<country>
<company>
ROM
Disk
Hardware
Cartriges
<company>
<device name>
Computers
<company>
<device name>
Devices
<company>
<device name>
Pictures
<country>
Booklets
Books
Flyers
Magazines
Manuals
Covers
Other


So how do you organize it ?